CollocWt.h

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////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 1993-2021 The Octave Project Developers
//
// See the file COPYRIGHT.md in the top-level directory of this
// distribution or <https://octave.org/copyright/>.
//
// This file is part of Octave.
//
// Octave is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
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// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Octave; see the file COPYING.  If not, see
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////////////////////////////////////////////////////////////////////////
 
#if ! defined (octave_CollocWt_h)
#define octave_CollocWt_h 1
 
#include "octave-config.h"
 
#include <iosfwd>
 
#include "dMatrix.h"
#include "dColVector.h"
 
class
OCTAVE_API
CollocWt
{
public:
 
  CollocWt (void)
    : n (0), inc_left (0), inc_right (0), lb (0.0), rb (1.0),
      Alpha (0.0), Beta (0.0), r (), q (), A (), B (), initialized (false) { }
 
  CollocWt (octave_idx_type nc, octave_idx_type il, octave_idx_type ir)
    : n (nc), inc_left (il), inc_right (ir), lb (0.0), rb (1.0),
      Alpha (0.0), Beta (0.0), r (), q (), A (), B (), initialized (false) { }
 
  CollocWt (octave_idx_type nc, octave_idx_type il, octave_idx_type ir,
            double l, double rr)
    : n (nc), inc_left (il), inc_right (ir), lb (l), rb (rr),
      Alpha (0.0), Beta (0.0), r (), q (), A (), B (), initialized (false) { }
 
  CollocWt (octave_idx_type nc, double a, double b, octave_idx_type il,
            octave_idx_type ir)
    : n (nc), inc_left (il), inc_right (ir), lb (0.0), rb (1.0),
      Alpha (a), Beta (b), r (), q (), A (), B (), initialized (false) { }
 
  CollocWt (octave_idx_type nc, double a, double b, octave_idx_type il,
            octave_idx_type ir,
            double ll, double rr)
    : n (nc), inc_left (il), inc_right (ir), lb (ll), rb (rr),
      Alpha (a), Beta (b), r (), q (), A (), B (), initialized (false) { }
 
  CollocWt (const CollocWt& a)
    : n (a.n), inc_left (a.inc_left), inc_right (a.inc_right),
      lb (a.lb), rb (a.rb), Alpha (a.Alpha), Beta (a.Beta),
      r (a.r), q (a.q), A (a.A), B (a.B),
      initialized (a.initialized) { }
 
  CollocWt& operator = (const CollocWt& a)
  {
    if (this != &a)
      {
        n = a.n;
        inc_left = a.inc_left;
        inc_right = a.inc_right;
        lb = a.lb;
        rb = a.rb;
        r = a.r;
        q = a.q;
        A = a.A;
        B = a.B;
        initialized = a.initialized;
      }
    return *this;
  }
 
  ~CollocWt (void) = default;
 
  CollocWt& resize (octave_idx_type nc)
  {
    n = nc;
    initialized = false;
    return *this;
  }
 
  CollocWt& add_left (void)
  {
    inc_left = 1;
    initialized = false;
    return *this;
  }
 
  CollocWt& delete_left (void)
  {
    inc_left = 0;
    initialized = false;
    return *this;
  }
 
  CollocWt& set_left (double val);
 
  CollocWt& add_right (void)
  {
    inc_right = 1;
    initialized = false;
    return *this;
  }
 
  CollocWt& delete_right (void)
  {
    inc_right = 0;
    initialized = false;
    return *this;
  }
 
  CollocWt& set_right (double val);
 
  CollocWt& set_alpha (double val)
  {
    Alpha = val;
    initialized = false;
    return *this;
  }
 
  CollocWt& set_beta (double val)
  {
    Beta = val;
    initialized = false;
    return *this;
  }
 
  octave_idx_type ncol (void) const { return n; }
 
  octave_idx_type left_included (void) const { return inc_left; }
  octave_idx_type right_included (void) const { return inc_right; }
 
  double left (void) const { return lb; }
  double right (void) const { return rb; }
 
  double width (void) const { return rb - lb; }
 
  double alpha (void) const { return Alpha; }
  double beta (void) const { return Beta; }
 
  ColumnVector roots (void) { if (! initialized) init (); return r; }
  ColumnVector quad (void) { if (! initialized) init (); return q; }
 
  ColumnVector quad_weights (void) { return quad (); }
 
  Matrix first (void) { if (! initialized) init (); return A; }
 
  Matrix second (void) { if (! initialized) init (); return B; }
 
  friend std::ostream& operator << (std::ostream&, const CollocWt&);
 
protected:
 
  octave_idx_type n;
 
  octave_idx_type inc_left;
  octave_idx_type inc_right;
 
  double lb;
  double rb;
 
  double Alpha;
  double Beta;
 
  ColumnVector r;
  ColumnVector q;
 
  Matrix A;
  Matrix B;
 
  bool initialized;
 
  void init (void);
 
  void error (const char *msg);
};
 
#endif